Full-Time

Senior Mechanical Engineer

Thermal Interface Material Integration

Boston Materials

Boston Materials

11-50 employees

Manufactures liquid-metal thermal interface materials

Compensation Overview

$120k - $170k/yr

Billerica, MA, USA

In Person

Category
Mechanical Engineering (1)
Required Skills
CAD
Data Analysis
Requirements
  • Bachelor’s or Master’s degree in Mechanical Engineering, Materials Science, Electrical Engineering, or related field.
  • CAD modeling and drafting, hands-on experience prototyping, mechanical and thermal testing, data analysis, and report generation.
  • 3–7 years of experience in semiconductor packaging, electronics assembly, thermal interface materials, or applications engineering in a B2B technical product company.
  • Strong understanding of system-level processor packaging/thermal design (cold plate and stiffener/lid design, TIM1/TIM1.5/TIM2 selection) and associated reliability testing (uHAST, TCT, HTS, etc.).
  • Proven ability to lead cross-functional technical efforts and deliver customer-specific solutions on time.
  • Excellent communication skills, with the ability to explain complex technical topics to both engineers and non-technical stakeholders.
Responsibilities
  • Lead internal design and development efforts to integrate our liquid-metal based thermal interface materials into customer-specific electronic packages.
  • Build and test package and provision assembly mockups to demonstrate design feasibility, which may include mechanical and reliability testing.
  • Document designs for both fabrication and customer coordination. Lead effort to fabricate provisions either internally or externally in support of customer schedules.
  • Support R&D team in continuous improvement of system performance.
  • Act as the primary technical point of contact for ODM, OSAT, and hyperscaler customer technical teams during early and mid-stage engagement.
  • Work closely with business development team to uncover and document customer technical requirements, including geometric, load, assembly, environmental constraints, thermal budgets, and reliability standards.
  • Prepare and deliver technical content such as application notes, design guides, and data reports to support customer decision-making and qualification processes.
  • Support customer testing trials, troubleshooting technical issues in real time and coordinating resolution with internal engineering, manufacturing, and quality teams.
  • Capture customer feedback and synthesize insights to guide internal product development and roadmap planning.
Desired Qualifications
  • Experience with design and fabrication of elastomeric materials is a plus.
  • Familiarity with tools such as thermal test setups, C-SAM, X-ray, or FEA modeling is a plus

Boston Materials develops and manufactures advanced energy-transfer composites for high-performance electronics, aerospace, and electrified mobility. Its Liquid Metal ZRT® uses vertically oriented carbon fibers embedded in a liquid metal matrix to create a drop-in thermal interface that conducts heat efficiently between components, and is designed for seamless integration into automated assembly. The company differentiates itself by combining Z-axis carbon fiber reinforcement with a liquid metal matrix and scaling via roll-to-roll production using reclaimed carbon fiber, enabling multiple applications from a single platform. Its goal is to scale production to meet industrial demand across semiconductor, aerospace, and electrified-vehicle markets while expanding sustainability through recycled carbon fiber use.

Company Size

11-50

Company Stage

Early VC

Total Funding

$42.8M

Headquarters

Billerica, Massachusetts

Founded

2016

Simplify Jobs

Simplify's Take

What believers are saying

  • Mitsubishi Chemical invested via Diamond Edge Ventures for AI data center thermal solutions.
  • Raised $13.5M from AccelR8, Valo Ventures to expand semiconductor manufacturing in 2026.
  • 60-inch-wide roll-to-roll production scales ZRT films with PEEK, PEI polymers.

What critics are saying

  • Intel's Direct Die Cooling eliminates TIMs like ZRT in Lunar Lake processors by Q2 2026.
  • Nvidia GB200 racks deploy integrated liquid cooling, obsoleting drop-in ZRT preforms in Q3 2026.
  • $2M debt at 12-15% interest forces dilution as capex exceeds $13.5M raise by mid-2027.

What makes Boston Materials unique

  • Liquid Metal ZRT® delivers 5-8°C cooling improvement over thermal greases in data center GPUs.
  • ZRT interlaminar films mitigate delamination in aerospace composites using Z-axis Fiber™.
  • Z-axis carbon fiber enables lightweight bipolar plates for hydrogen fuel cells from recycled fiber.

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Benefits

Health Insurance

Vision Insurance

Dental Insurance

401(k) plan

4 weeks of supplemental Paid Parental and Family Leave

Unlimited Paid Time Off

Holidays: 14 days/year

Growth & Insights and Company News

Headcount

6 month growth

0%

1 year growth

0%

2 year growth

-3%
TipRanks
Dec 11th, 2025
Mitsubishi Chemical invests in Boston Materials for AI data centre thermal solutions

Mitsubishi Chemical Group and Boston Materials have announced a strategic collaboration to advance thermal management solutions for high-performance computing and AI data centres. The partnership includes an investment in Boston Materials from Mitsubishi's US-based corporate venture capital arm, Diamond Edge Ventures. The companies will develop the second-generation Liquid Metal ZRT product, a thermal interface material using Boston Materials' patented Z-axis Carbon Fibre technology and proprietary liquid metal alloys. Boston Materials will leverage Mitsubishi Chemical Group's supply chain for high-performance electronic materials. The collaboration aims to address thermal management challenges in semiconductor packaging for data centre applications.

FinSMEs
Nov 7th, 2024
Boston Materials Raises $13.5M Funding

Boston Materials, based in Billerica, MA, raised $13.5M in funding led by AccelR8 and Diamond Edge Ventures, with participation from Valo Ventures, Gatemore Venture Partners, Collab Fund, and Woori Venture Partners. The company plans to use the funds to expand into the semiconductor market, leveraging its Z-axis Fiber™ technology.

FinSMEs
Nov 7th, 2024
Boston Materials Raises $13.5M in Funding

Boston Materials, a Billerica, MA-based manufacturer of advanced materials for semiconductors and aircraft platforms, raised $13.5M in funding

Securities and Exchange Commission
Oct 8th, 2024
SEC FORM D

The Securities and Exchange Commission has not necessarily reviewed the information in this filing and has not determined if it is accurate and complete.The reader should not assume that the information is accurate and complete.

JEC Group
Aug 28th, 2024
Boston Materials announces 60-inch-wide industrial scale production of its patented Z-axis carbon fiber materials

Boston Materials also announced the limited-release of its new ZRT thermoplastic composite films leveraging high-performance polymers such as PEEK, PEI, PPS, polycarbonate, and more.